Fifth wheel base rail



FIG. 1 is a top plan view of the fifth wheel base rail of the present invention;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a left side elevational view, the right side being a substantial mirror image, thereof; and

FIG. 4 is a front elevational view, the rear being a substantial mirror image thereof. 

The ornamental design for a fifth wheel base rail, as shown and described. 